RF-005Original text reviewed
DNA damage in selected rodent tissues
The reported finding
Comet assays found increased DNA damage in male-mouse frontal cortex, female-mouse blood and male-rat hippocampus under specified conditions. Micronucleus assays were negative.
Reading it carefully
Hippocampal significance depended on cell-scoring approach. Pilot work informed temperature limits; temperature was not monitored during this genotoxicity experiment.
Inside the study
Exposure conditions
Rats: 900 MHz, 1.5-6 W/kg, about 19 weeks; mice: 1900 MHz, 2.5-10 W/kg, 14 weeks; GSM/CDMA.
Design & controls
Five animals per sex/dose/modulation for genotoxicity; 100- and 150-cell analyses reported.
Related research & shared cohorts
NTP interim cohort, not an independent laboratory replication of RF-001.
The protection question raised
Do the tissue-specific DNA-test changes persist or connect to disease? Their significance depends on assay agreement and downstream function. Shared NTP animals and programme links do not provide independent confirmation of the cancer finding.
Source verification
Original indexed methods/results reviewed in earlier verification work; discussion/disclosures rechecked
Where to find the result
Results and Discussion; figure captions; statistical methods
Editorial notices
Primary PubMed linked-notice record checked 20 Oct 2026; no correction, concern or retraction linked at check. This is not an exhaustive publisher-history certification.
Funding
NTP contracts HHSN291200555544, N01-ES-35514 and HHSN273201300009C; NIH NIEHS intramural programme ZIA ES103316-04.
Conflicts of interest
Authors state no competing financial interests.
Original publication
Smith-Roe SL, Wyde ME, Stout MD, Winters JW, Hobbs CA, Shepard KG, Green AS, Kissling GE, Shockley KR, Tice RR, Bucher JR, Witt KL. Evaluation of the genotoxicity of cell phone radiofrequency radiation in male and female rats and mice following subchronic exposure. Environmental and Molecular Mutagenesis. 2020;61(2):276-290. doi:10.1002/em.22343.